Shaft



FIG. 1 is a top, right, frontal perspective view of a shaft showing my new design according to one embodiment;

FIG. 2 shows portions of the shaft of FIG. 1, enlarged with center section excluded for clarity of illustration;

FIG. 3 is a top view of the shaft of FIG. 1, shown enlarged with center section excluded for clarity of illustration;

FIG. 4 is a frontal view of the shaft of FIG. 1, shown enlarged with center section excluded for clarity of illustration; and,

FIG. 5 is a right end view of the shaft of FIG. 2, the left end being identical, the broken lines showing environment forming no part of the claimed design. 

CLAIM The ornamental design for a shaft, as shown and described. 